<?php

namespace PHPExcel\Chart;

/**
 * \PHPExcel\Chart\DataSeriesValues
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category PHPExcel
 * @package PHPExcel_Chart
 * @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
 * @version ##VERSION##, ##DATE##
 */
class DataSeriesValues {
    const DATASERIES_TYPE_STRING = 'String';
    const DATASERIES_TYPE_NUMBER = 'Number';
    private static $dataTypeValues = array(
    self::DATASERIES_TYPE_STRING,
    self::DATASERIES_TYPE_NUMBER 
    );
    
    /**
     * Series Data Type
     *
     * @var string
     */
    private $dataType;
    
    /**
     * Series Data Source
     *
     * @var string
     */
    private $dataSource;
    
    /**
     * Format Code
     *
     * @var string
     */
    private $formatCode;
    
    /**
     * Series Point Marker
     *
     * @var string
     */
    private $pointMarker;
    
    /**
     * Point Count (The number of datapoints in the dataseries)
     *
     * @var integer
     */
    private $pointCount = 0;
    
    /**
     * Data Values
     *
     * @var array of mixed
     */
    private $dataValues = array();
    
    /**
     * Create a new DataSeriesValues object
     */
    public function __construct($dataType = self::DATASERIES_TYPE_NUMBER, $dataSource = null, $formatCode = null, $pointCount = 0, $dataValues = array(), $marker = null) {
        $this->setDataType($dataType);
        $this->dataSource = $dataSource;
        $this->formatCode = $formatCode;
        $this->pointCount = $pointCount;
        $this->dataValues = $dataValues;
        $this->pointMarker = $marker;
    }
    
    /**
     * Get Series Data Type
     *
     * @return string
     */
    public function getDataType() {
        return $this->dataType;
    }
    
    /**
     * Set Series Data Type
     *
     * @param string $dataType
     *            Datatype of this data series
     *            Typical values are:
     *            \PHPExcel\Chart\DataSeriesValues::DATASERIES_TYPE_STRING
     *            Normally used for axis point values
     *            \PHPExcel\Chart\DataSeriesValues::DATASERIES_TYPE_NUMBER
     *            Normally used for chart data values
     * @return DataSeriesValues
     * @throws Exception
     */
    public function setDataType($dataType = self::DATASERIES_TYPE_NUMBER) {
        if (!in_array($dataType, self::$dataTypeValues)) {
            throw new Exception('Invalid datatype for chart data series values');
        }
        $this->dataType = $dataType;
        
        return $this;
    }
    
    /**
     * Get Series Data Source (formula)
     *
     * @return string
     */
    public function getDataSource() {
        return $this->dataSource;
    }
    
    /**
     * Set Series Data Source (formula)
     *
     * @param string $dataSource            
     * @return DataSeriesValues
     */
    public function setDataSource($dataSource = null, $refreshDataValues = true) {
        $this->dataSource = $dataSource;
        
        if ($refreshDataValues) {
            // TO DO
        }
        
        return $this;
    }
    
    /**
     * Get Point Marker
     *
     * @return string
     */
    public function getPointMarker() {
        return $this->pointMarker;
    }
    
    /**
     * Set Point Marker
     *
     * @param string $marker            
     * @return DataSeriesValues
     */
    public function setPointMarker($marker = null) {
        $this->pointMarker = $marker;
        
        return $this;
    }
    
    /**
     * Get Series Format Code
     *
     * @return string
     */
    public function getFormatCode() {
        return $this->formatCode;
    }
    
    /**
     * Set Series Format Code
     *
     * @param string $formatCode            
     * @return DataSeriesValues
     */
    public function setFormatCode($formatCode = null) {
        $this->formatCode = $formatCode;
        
        return $this;
    }
    
    /**
     * Get Series Point Count
     *
     * @return integer
     */
    public function getPointCount() {
        return $this->pointCount;
    }
    
    /**
     * Identify if the Data Series is a multi-level or a simple series
     *
     * @return boolean
     */
    public function isMultiLevelSeries() {
        if (count($this->dataValues) > 0) {
            return is_array($this->dataValues[0]);
        }
        return null;
    }
    
    /**
     * Return the level count of a multi-level Data Series
     *
     * @return boolean
     */
    public function multiLevelCount() {
        $levelCount = 0;
        foreach ( $this->dataValues as $dataValueSet ) {
            $levelCount = max($levelCount, count($dataValueSet));
        }
        return $levelCount;
    }
    
    /**
     * Get Series Data Values
     *
     * @return array of mixed
     */
    public function getDataValues() {
        return $this->dataValues;
    }
    
    /**
     * Get the first Series Data value
     *
     * @return mixed
     */
    public function getDataValue() {
        $count = count($this->dataValues);
        if ($count == 0) {
            return null;
        } elseif ($count == 1) {
            return $this->dataValues[0];
        }
        return $this->dataValues;
    }
    
    /**
     * Set Series Data Values
     *
     * @param array $dataValues            
     * @param boolean $refreshDataSource
     *            TRUE - refresh the value of dataSource based on the values of $dataValues
     *            FALSE - don't change the value of dataSource
     * @return DataSeriesValues
     */
    public function setDataValues($dataValues = array(), $refreshDataSource = true) {
        $this->dataValues = \PHPExcel\Calculation\Functions::flattenArray($dataValues);
        $this->pointCount = count($dataValues);
        
        if ($refreshDataSource) {
            // TO DO
        }
        
        return $this;
    }
    private function stripNulls($var) {
        return $var !== null;
    }
    public function refresh(\PHPExcel\Worksheet $worksheet, $flatten = true) {
        if ($this->dataSource !== null) {
            $calcEngine = \PHPExcel\Calculation::getInstance($worksheet->getParent());
            $newDataValues = \PHPExcel\Calculation::unwrapResult($calcEngine->_calculateFormulaValue('=' . $this->dataSource, null, $worksheet->getCell('A1')));
            if ($flatten) {
                $this->dataValues = \PHPExcel\Calculation\Functions::flattenArray($newDataValues);
                foreach ( $this->dataValues as &$dataValue ) {
                    if ((!empty($dataValue)) && ($dataValue[0] == '#')) {
                        $dataValue = 0.0;
                    }
                }
                unset($dataValue);
            } else {
                $cellRange = explode('!', $this->dataSource);
                if (count($cellRange) > 1) {
                    list(, $cellRange) = $cellRange;
                }
                
                $dimensions = \PHPExcel\Cell::rangeDimension(str_replace('$', '', $cellRange));
                if (($dimensions[0] == 1) || ($dimensions[1] == 1)) {
                    $this->dataValues = \PHPExcel\Calculation\Functions::flattenArray($newDataValues);
                } else {
                    $newArray = array_values(array_shift($newDataValues));
                    foreach ( $newArray as $i => $newDataSet ) {
                        $newArray[$i] = array(
                        $newDataSet 
                        );
                    }
                    
                    foreach ( $newDataValues as $newDataSet ) {
                        $i = 0;
                        foreach ( $newDataSet as $newDataVal ) {
                            array_unshift($newArray[$i++], $newDataVal);
                        }
                    }
                    $this->dataValues = $newArray;
                }
            }
            $this->pointCount = count($this->dataValues);
        }
    }
}
